145642172669 has 16 divisors (see below), whose sum is σ = 170989807488. Its totient is φ = 121431638592.

The previous prime is 145642172651. The next prime is 145642172699. The reversal of 145642172669 is 966271246541.

It is a cyclic number.

It is not a de Polignac number, because 145642172669 - 2¹⁶ = 145642107133 is a prime.

It is a super-2 number, since 2×145642172669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145642172669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145642172639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991394 + ... + 1128780.

It is an arithmetic number, because the mean of its divisors is an integer number (10686862968).

Almost surely, 2^145642172669 is an apocalyptic number.

It is an amenable number.

145642172669 is a deficient number, since it is larger than the sum of its proper divisors (25347634819).

145642172669 is a wasteful number, since it uses less digits than its factorization.

145642172669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141524.

The product of its digits is 4354560, while the sum is 53.

The spelling of 145642172669 in words is "one hundred forty-five billion, six hundred forty-two million, one hundred seventy-two thousand, six hundred sixty-nine".